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• W2126837396 abstract "Backgrounds and Aims In chronic hepatitis B virus (HBV) infection, quantitative HBV surface antigen (qHBsAg) is useful for monitoring viral replication and treatment responses. We aimed to determine whether pre-S mutations have any effect on circulating qHBsAg. Methods Plasmids expressing 1–8 amino acid deletion in pre-S1 (“pre-S1Δ1-8”) and 3-25 amino acid deletion in pre-S2 (“pre-S2Δ3-25”) were constructed. At 72 h post-transfection into Huh7 cells, qHBsAg were measured using electrochemiluminescence immunoassay analyzer. To mimic milieus of quasispecies, we co-transfected either pre-S1Δ1-8 or pre-S2Δ3-25 with wild type (WT). Results Pre-S mutations affected transcription and replication ability of HBV because of altered overlapping polymerase. Compared with WT, extracellular qHBsAg in pre-S1Δ1-8 and pre-S2Δ3-25 were on average 3.87-fold higher and 0.92-fold lower, respectively, whereas intracellular qHBsAg in pre-S1Δ1-8 and pre-S2Δ3-25 were 0.57-fold lower and 1.60-fold higher, respectively. Immunofluorescence staining of cellular HBsAg showed that pre-S1Δ1-8 had less staining and that pre-S2Δ3-25 had denser staining. As ratios of either pre-S1Δ1-8 or pre-S2Δ3-25:WT increased from 0:10 to 10:0 gradually, relative extracellular qHBsAg increased from 1.0 to 3.85 in pre-S1Δ1-8 co-transfection, whereas those decreased from 1.0 to 0.88 in pre-S2Δ3-25 co-transfection. Conclusion Pre-S mutations exhibit different phenotypes of genome replication and HBsAg expression according to their locations. Thus, qHBsAg level for diagnosis and prognostification in chronic HBV infection should be used more cautiously, considering emergences of pre-S deletion mutants." @default.
• W2126837396 created "2016-06-24" @default.
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• W2126837396 date "2014-03-20" @default.
• W2126837396 modified "2023-09-27" @default.
• W2126837396 title "Pre-S mutations of hepatitis B virus affect genome replication and expression of surface antigens" @default.
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• W2126837396 doi "https://doi.org/10.1111/jgh.12415" @default.
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